A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 5996-00-471-0540
NSN 6620-00-995-4958
NSN 5960-00-201-5265
NSN 6110-01-167-4811
NSN 6220-01-437-8089
NSN 5835-00-830-6416
NSN 5925-01-350-2930
NSN 2925-00-132-1280
NSN 5855-01-302-9778
NSN 6145-01-268-3073
NSN 6135-01-625-0765
NSN 6685-00-319-8882